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Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

(OP)
If grout over 90 min old is it rejectable

RE: Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

If the specification references ASTM C94, then generally, yes.

Grout is a form of concrete. Its cementitious properties are essentially the same and it is affected in a manner similar to conventional concrete.

RE: Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

See ACI 530.1-11 Specification for Masonry Structures part 3.5A: "Place grout within 1 1/2 hr from introducing water in the mixture and prior to initial set."

RE: Grout Delivered to the job site how old can it be at the time of rejection? like 90 min for Concrete

Well the setting time also affected by w/c ratio. Now a days, the initial setting time of cement can be greatly increased by introducing admixtures. I don't think 90 mins period grout should be rejected but that is another case if it is in your TS.Simple way to confirm is to test it at your site's material testing laboratory to find the initial setting time.

KARMA

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